18650 5V 2.4A Lithium Battery Digital Display Charging Module with Dual USB Power Bank Module

Dual USB Output • LED Battery Display • Built-in Protection • DIY Power Bank Module

The Dual USB 5V Power Bank Charging Module is a compact and feature-rich charging and protection board designed for building custom power banks using 3.7V Lithium-Ion or Lithium Polymer batteries. Supporting both USB Type-C and Micro USB charging inputs, the module provides convenient charging compatibility while delivering stable 5V output through dual USB ports.

Equipped with an intelligent boost converter, the module efficiently converts the battery voltage (3.0V–4.2V) into a regulated 5V output with a maximum output current of 2.4A, making it suitable for charging smartphones, tablets, Bluetooth devices, smartwatches, and other USB-powered electronics.

The onboard digital LED display shows the battery level from 0% to 100% in real time and also indicates charging (IN) and discharging (OUT) status, allowing users to easily monitor battery capacity.

Designed with multiple safety features including overcharge, over-discharge, over-current, short-circuit, and constant current protection, this module ensures safe and reliable operation. It also includes dedicated LED terminals for adding a flashlight, making it an ideal solution for DIY portable power bank project

Note: This module is designed for single-cell (1S) 3.7V Lithium-Ion/Li-Po batteries connected in parallel only. Do not connect batteries in series, as doing so may permanently damage the module.

 Features

• Supports USB Type-C and Micro USB charging input
• Dual USB output ports for charging two devices simultaneously
• Maximum output current up to 2.4A
• Intelligent 5V boost converter
• Real-time LED battery percentage display (0–100%)
• Charging and output status indicators
• Built-in flashlight LED connection
• High conversion efficiency
• Multiple protection circuits for safe operation
• Compact PCB design for DIY power bank projects

 Technical Specifications

• Product Type: Power Bank Charging & Protection Module
• Battery Type: Single Cell (1S) Lithium-Ion / Lithium Polymer
• Battery Voltage: 3.0V–4.2V DC
• Charging Input: USB Type-C & Micro USB
• Input Voltage: 5V DC
• USB Output Ports: 2
• Output Voltage: 5V DC
• Maximum Output Current: 2.4A
• Display Type: Digital LED Battery Percentage Display
• Battery Indicator: 0–100%
• Status Indicators: Charging (IN) / Output (OUT)
• Protection Functions:
  • Overcharge Protection
  • Over-discharge Protection
  • Over-current Protection
  • Short Circuit Protection
  • Constant Current Charging
• LED Flashlight Output: Supported
• Module Dimensions: Approx. 65 × 25 × 10 mm

 Applications

Suitable for:

• DIY Power Banks
• 18650 Battery Packs
• Lithium Battery Projects
• Portable USB Chargers
• Emergency Power Supplies
• Mobile Phone Chargers
• Bluetooth Speaker Power Banks
• Raspberry Pi Power Supply
• Arduino Projects
• Portable Electronics
• DIY Electronics
• Battery Backup Systems

 Package Includes

• 1 × Dual USB 5V Type-C & Micro USB Power Bank Charging Module with LED Display

 Important Notes

• Connect the battery correctly: B+ to battery positive and B- to battery negative.
• Incorrect battery polarity may permanently damage the module.
• Use 3.7V Lithium-Ion or Li-Po batteries only.
• If using multiple cells, connect them only in parallel.
• Do not connect batteries in series, as this may cause overheating and permanent module failure.
• Quick Charge performance depends on the connected device, charging cable, charger, and battery quality.